Spectral asymmetry due to magnetic coordinates

Jong-kyu Park; Boozer, Allen H.; Menard, Jonathan E.
June 2008
Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p064501
Academic Journal
The use of magnetic coordinates is ubiquitous in toroidal plasma physics but the distortion in Fourier spectra produced by these coordinates is not well known. A spatial symmetry of the field is not always represented by a symmetry in the Fourier spectrum when magnetic coordinates are used because of the distortion of the toroidal angle. The practical importance of spectral distortion is illustrated with a tokamak example.


Related Articles

  • Current reversal equilibrium configurations in the alternating-current operation of tokamaks. Yu, Jun; Shaojie Wang; Jiangang Li // Physics of Plasmas;May2006, Vol. 13 Issue 5, p053110 

    The equilibrium configurations with central current density reversal and those with two oppositely flowing current components on the high-field side and low-field side have been numerically modeled by using the exact solution of the Grad-Shafranov-Helmholtz equation, with the parameters chosen...

  • Plasma blobs in a basic toroidal experiment: Origin, dynamics, and induced transport. Müller, S. H.; Diallo, A.; Fasoli, A.; Furno, I.; Labit, B.; Podestà, M. // Physics of Plasmas;Nov2007, Vol. 14 Issue 11, p110704 

    Detaching plasma blobs with very similar properties to tokamaks are observed in the basic toroidal plasma experiment TORPEX [A. Fasoli et al., Phys. Plasmas 13, 055902 (2006)]. The blobs originate from the breaking of wave crests of a drift-interchange wave, which span over regions characterized...

  • Inductance Measurement and Magnetic Flux Density Analysis of Modular Toroidal Coil Using FEM Approach Applicable to Tokamak Reactors. Pahlavani, M. R. Alizadeh; Shiri, A.; Mohammadpour, H. A.; Shoulaie, A. // International Review of Electrical Engineering;Jan/Feb2010, Vol. 5 Issue 1, p335 

    In this paper, equations for calculation of the self and mutual inductances of the Modular Toroidal Coil (MTC) applicable to Tokamak reactors are presented. The MTC is composed of several solenoidal coils (SCs) connected in series and distributed in the toroidal and the symmetrical form. These...

  • Stochastization of Magnetic Field Surfaces in Tokamaks by an Inner Coil. Chávez-Alarcón, Esteban; Herrera-Velázquez, J. Julio E.; Braun-Gitler, Eliezer // AIP Conference Proceedings;2006, Vol. 875 Issue 1, p347 

    A 3-D code has been developed in order to simulate the magnetic field lines in circular cross-section tokamaks. The toroidal magnetic field can be obtained from the individual fields of circular coils arranged around the torus, or alternatively, as a ripple-less field. The poloidal field is...

  • Lower hybrid current drive efficiency at high density on Tore Supra. Goniche, M.; Sharma, P. K.; Basiuk, V.; Baranov, Y.; Castaldo, C.; Cesario, R.; Decker, J.; Delpech, L.; Ekedahl, A.; Hillairet, J.; Kirov, K.; Mazon, D.; Oosako, T.; Peysson, Y.; Prou, M. // AIP Conference Proceedings;12/23/2011, Vol. 1406 Issue 1, p407 

    No abstract available.

  • EL ITER PROGRESA.  // DYNA - Ingeniería e Industria;nov/dic2012, Vol. 87 Issue 6, p608 

    No abstract available.

  • Studies of improved electron confinement in low density L-mode National Spherical Torus Experiment discharges. Stutman, D.; Finkenthal, M.; Tritz, K.; Redi, M. H.; Kaye, S. M.; Bell, M. G.; Bell, R. E.; LeBlanc, B. P.; Hill, K. W.; Medley, S. S.; Menard, J. E.; Rewoldt, G.; Wang, W. X.; Synakowski, E. J.; Levinton, F.; Kubota, S.; Bourdelle, C.; Dorland, W. // Physics of Plasmas;Sep2006, Vol. 13 Issue 9, p092511 

    Electron transport is rapid in most National Spherical Torus Experiment, M. Ono et al., Nucl. Fusion 40, 557 (2000) beam heated plasmas. A regime of improved electron confinement is nevertheless observed in low density L-mode (“low-confinement”) discharges heated by early beam...

  • Toroidal rotation and radial electric field driven by the lower-hybrid-wave in a tokamak fusion reactor. Wang, Shaojie // Physics of Plasmas;Oct2011, Vol. 18 Issue 10, p102502 

    A theoretical model is proposed to interpret the counter-current rotation driven by the lower-hybrid-wave observed in the tokamak lower-hybrid-wave parallel current drive experiments. It is found that ions absorb the toroidal momentum indirectly from the wave through collisional friction with...

  • Experimental study of toroidal Alfvén modes in the Globus-M spherical tokamak. Petrov, Yu.; Patrov, M.; Gusev, V.; Ivanov, A.; Minaev, V.; Sakharov, N.; Tolstyakov, S.; Kurskiev, G. // Plasma Physics Reports;Dec2011, Vol. 37 Issue 12, p1001 

    In the experiments carried out on the Globus-M tokamak in regimes with injection of 26-keV neutral beams with a power of 0.75-0.85 MW, two branches of instabilities excited by fast ions were observed in the early stage of a discharge: a low-frequency energetic particle mode (EPM) in the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics